null EGLConfig config

QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/var/volatile/tmp/runtime-root'
qt.qpa.egldeviceintegration: EGL device integration plugin keys: ("eglfs_emu", "eglfs_kms_egldevice", "eglfs_kms")
qt.qpa.egldeviceintegration: EGL device integration plugin keys (sorted): ("eglfs_kms", "eglfs_emu", "eglfs_kms_egldevice")
qt.qpa.egldeviceintegration: Trying to load device EGL integration "eglfs_kms"
qt.qpa.eglfs.kms: Loading KMS setup from "/etc/qt5/eglfs_kms_cfg.json"
qt.qpa.eglfs.kms: Requested configuration (some settings may be ignored):
        headless: false
        hwcursor: false
        pbuffers: true
        separateScreens: false
        virtualDesktopLayout: 0
        outputs: QMap(("VGA1", QMap(("mode", QVariant(QString, "off"))("name", QVariant(QString, "VGA1")))))
qt.qpa.eglfs.kms: New DRM/KMS via GBM integration created
qt.qpa.egldeviceintegration: Using EGL device integration "eglfs_kms"
qt.qpa.eglfs.kms: platformInit: Opening DRM device
qt.qpa.eglfs.kms: GBM: Using DRM device "/dev/dri/card0" specified in config file
qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
qt.qpa.eglfs.kms: Initalizing event reader for device 0x4c3de0 fd 5
qt.qpa.eglfs.kms: Querying EGLDisplay
...
Cannot find EGLConfig, returning null config
qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
qt.qpa.eglfs.kms: Setting mode for screen UNKNOWN1
qt.qpa.input: evdevtouch: Updating QInputDeviceManager device count: 1 touch devices, 0 pending handler(s)
qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258
qt.qpa.eglfs.kms: Adding FB, size 1024x600, DRM format 0x34325258

// not working
qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
qt.qpa.eglfs.kms: Initalizing event reader for device 0x4c3de0 fd 5
qt.qpa.eglfs.kms: Querying EGLDisplay

// working
qt.qpa.eglfs.kms: Using backend-provided DRM device /dev/dri/card0
qt.qpa.eglfs.kms: Creating GBM device for file descriptor 5 obtained from "/dev/dri/card0"
qt.qpa.eglfs.kms: Initalizing event reader for device 0x2bef0 fd 5
qt.qpa.eglfs.kms: Querying EGLDisplay

// not working
qt.qpa.eglfs.kms: Output UNKNOWN1 can use 4 planes: 35 38 43 48
qt.qpa.eglfs.kms: Chose plane 35 for output UNKNOWN1 (crtc id 55) (may not be applicable)
qt.qpa.eglfs.kms: Using plain OpenGL mouse cursor
qt.qpa.eglfs.kms: No EDID data for output "UNKNOWN1"
qt.qpa.eglfs.kms: Sorted screen list: QVector(OrderedScreen(QPlatformScreen=0x4e1430 ("UNKNOWN1") : 2147483647 / QPoint(0,0) / primary: false))
qt.qpa.eglfs.kms: Adding QPlatformScreen 0x4e1430 ( "UNKNOWN1" ) to QPA with geometry QRect(0,0 1024x600) and isPrimary= false
qt.qpa.input: evdevkeyboard: Using device discovery
qt.qpa.input: udev device discovery for type QFlags<QDeviceDiscovery::QDeviceType>(Device_Keyboard)

// working
qt.qpa.eglfs.kms: Output UNKNOWN1 can use 4 planes: 35 38 43 48
qt.qpa.eglfs.kms: Output eglfs plane is: 35
qt.qpa.eglfs.kms: Using plain OpenGL mouse cursor
qt.qpa.eglfs.kms: No EDID data for output "UNKNOWN1"
qt.qpa.eglfs.kms: Sorted screen list: QVector(OrderedScreen(QPlatformScreen=0x494e8 ("UNKNOWN1") : 2147483647 / QPoint(0,0) / primary: false))
qt.qpa.eglfs.kms: Adding QPlatformScreen 0x494e8 ( "UNKNOWN1" ) to QPA with geometry QRect(0,0 1024x600) and isPrimary= false
Unable to query physical screen size, defaulting to 100 dpi.
To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSICAL_HEIGHT (in millimeters).
qt.qpa.input: evdevkeyboard: Using device discovery

Created context for format QSurfaceFormat(version 2.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize -1, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize -1, stencilBufferSize -1, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 1, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) with config:
        EGL_BUFFER_SIZE: 24
        EGL_ALPHA_SIZE: 0
        EGL_BLUE_SIZE: 8
        EGL_GREEN_SIZE: 8
        EGL_RED_SIZE: 8
        EGL_DEPTH_SIZE: 0
        EGL_STENCIL_SIZE: 0
        EGL_CONFIG_CAVEAT: 12344
        EGL_CONFIG_ID: 5
        EGL_LEVEL: 0
        EGL_MAX_PBUFFER_HEIGHT: 0
        EGL_MAX_PBUFFER_PIXELS: 0
        EGL_MAX_PBUFFER_WIDTH: 0
        EGL_NATIVE_RENDERABLE: 1
        EGL_NATIVE_VISUAL_ID: 875713112
        EGL_NATIVE_VISUAL_TYPE: 12344
        EGL_SAMPLES: 0
        EGL_SAMPLE_BUFFERS: 0
        EGL_SURFACE_TYPE: 4
        EGL_TRANSPARENT_TYPE: 12344
        EGL_TRANSPARENT_BLUE_VALUE: 0
        EGL_TRANSPARENT_GREEN_VALUE: 0
        EGL_TRANSPARENT_RED_VALUE: 0
        EGL_BIND_TO_TEXTURE_RGB: 0
        EGL_BIND_TO_TEXTURE_RGBA: 0
        EGL_MIN_SWAP_INTERVAL: 1
        EGL_MAX_SWAP_INTERVAL: 1